Improvement in breech-loading fire-arms



W. M. SCOTT.

Breach-Loading Fire-Arm.

No. 108,942. Patented Nov. l. 1870.

@M #wat jg@ @Mw/wf@ N.PETERS, FHoTO-UYHOGRAFHER. WASHINGTON. D, C,

' To all to whom it may concern:A

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WILLIAM MTDDLEDTTGH' scoTT, or BIRMINGHAM, ENGLAND.'

Letters Patent No. 108,942, dated Novemberv 1, 1870.

IMPROVEMENT IN BREECH-LOADING FIRE-ARMS.

The Schedule referred to in these Letters Patent and maldng part of the same.

DITOH SCOTT, do hereby declare the nature of the said invention, and in what manner the same is to be performed, to be particularly described and ascertained in and by the following'lstatement thereof; that is to say: Y

My invention relatesv to breech-loading fire-arms of the kind commonly' called drop-down guns, and consists of the improvements hereinafter described in the construction ofthe joint on which the barrel or barrels turn, the said improvements having for their object to preserve the close contact of the breech ends of the barrels against the face of the break-ott when the barrels are shut down, notwithstanding the wear to whichV the said joint is exposed.

In constructing the joints of .drop-down guns according to my invention, I make the parts in the ordinary manner, exceptingthat instead of making that part of the joint called the hook on the end of the lumpon the under side of the barrels in one piecewith the saidy lump, I make' the said hook separate from the lump and connect it therewith and adjust it in the Afollowing manner:

I make the said hook oa separate block or piece f iron or steel, having at its. back a stem.

.In the end of the lump on the barrels is a hole or recess, of a size proper to receive the-said stem at the back of the hook. Across'the lump another hole is made, 'into which the former-described holel opens.

The end of the stem at the back of the hoolcprojects' into the cross-opening in the lump, and takes its bearving against-the conical body of a screw, which is screwed into the cross-opening'. By the advance of the said conical screw in the said cross-opening, its inclined'body is made to push outward the stem of the hook to a greater or lesser extent, and when, by wear of the said hook upon the joint-pin ofthe gun, the breech ends of the barrels no longer bear .closely against the face of the break-off, it is only .necessary to turn and advance the said screw in the cross-opening when the hook of the joint is again brought into proper adjustment, andthe breech ends of the barrels are made to bear closely against the face of thebreako. After the conical screw has been adj usted 4it`may be fixed by a set-.screw or pin. Besides thestem described, the hook may be provided with a guide in order to give it greater steadiness and firmness on the end of the lump.

Instead of eitecting the adjustment of the separate hook of the-joint by a screw, it may be adjusted by a wedge or other inclined surface.

Having explained the nature of my'invention, I will proceed to describe, with reference t0 the accompanyf ing drawing, the manner in which the-same is to be performed. v

Figure l represents, in plan of nuclei' side, the barrels of a double drop-down gun, to which an adj ustable joint-hook, constructed according to my invention,

is applied;

Figure 2 is a side elevation of the same;v and Figure 3 is the same, with the adjustable joint-hook in longitudinal section.

Figure 4 is a crosssection of the same, taken on the line a, tig.2; and- Figures 5 and 6 are parts of my invention separately.

The same letters indicate the same parts in each figure.

b is the lump on the under side of the barrels, with which lump the fastening-bolt engages in the usual way. 'lhe front of the said lump is usually called the' hook, which hookand the fixed cross-,pin on the body'A of the gun constitute the joint on which the barrel or 4barrels turn.

According to my invention the front or hook c of the lump is made separate from thetixed .hind part b,

and tbe'said separate hook is capable of a limited sliding motion upon the said hind part b ofthe lump byv means of the guides d (l, with which the-back parts of the separate hook engage in the manner best seen'in figs. 2 and 3. .The separate joint-hook is represented detached in lig. 5.

The separate joint-hook c has a stem, c2, at back, which worksin alongitudinal hole, at e, in thelump b. The end of the' stem cz is inclined.

Across thelump b isa second hole, f, into which the longitudinal hole c-opens, (cee the section, iig. 3.)

lhe inclined end of the stem'c2 of the -hook c projects into the cross-hole f.

In the cross-hole j' is a wedge, g,- (shown separately in iig. 6,) adjusted 'in' the said hole by the screw h.

Ihe inclined face of the wedge g bearsagainst the inclined end of the stem c2 of the hook c, and supports the saidhook in its adj usted position.

By means of a screw, t, engaging with one of aseries of cut-away parts or notches onl the head of the screw h, (see ig.'1,) the said screw h may be lockedin its place, and the 'posit-ion of the wedge g, and, consequentlythat of the hook.c, preserved.

When, by wear of thehook c upon the joint-pin of the gun, the'breech ends of the barrels no longer bear closely against the face of the break-o, the lock-screw t is rstjturned and removed from the head of the screw li, so as to permit of the motion of the said screur h.l The said screw h is next turned and advanced so as to raise the wedge g in the vcross-hole j'. By this means the said wedge g, bearing more or less against the inclined end of the stem c2, pushes outward the hook c to the required extent, and thereby compensates for the wear of the said hook` The adjusted hook c is finally fixed by driving home the screw i and causing it to engage with the adj Listing-screw h.

Although I have shown iu the accompanying draw- I ing a separate wedge or inclined surface pushed houle by a separate screw for adjusting the separate hook7 yet a conical screw, working` in the hole f iu the lump, may be usedfor that purpose; or a second wedge or inclined surface may be used for advancing the wedge against which the stein of the hook bears, but I wish asset forth. y

WILLIAM MIDDLEDTGH' SCOTT. [11. s]

NVituesses GEORGE SHAW, Caiman Sto-eet, RICHARD SKERRETT. Birmingham.

outward to compensate for its wear upon the joint-pin,4 

